Chariclea Scordilis-Kelley

New thiophene-derived 28-π annulenes

Abstract McMurray coupling of α-terthiophene-5,5″-dicarboxaldehyde and of several N-alkyl derivatives of 2,5-bis(α-thienyl)pyrrole-5,5″-dicarboxaldehyde

Lithium and Sodium Standard Reduction Potentials in Ambient‐Temperature Chloroaluminate Molten Salts

By adding to buffered neutral (MEIC = 1‐methyl‐3‐ethylimidazolium chloride) ambient‐temperature molten salts, it is possible to measure directly the Li+/Li(s) couple at a tungsten electrode. From open‐circuit potential measurements performed in a large number of buffered melts, the Li+/Li(s) standard reduction potential is found to be −2.066 (±0.005) V vs. Al(III)/Al in a reference melt. Similarly, by adding to buffered neutral (DMPIC = 1,2‐dimethyl‐3‐propylimidazolium chloride), a Na+/Na(s) standard reduction potential of −2.097 (±0.050) V is directly determined.

Evidence for hydrogen bonds in 1,2-dimethyl-3-propylimidazolium chloride and its chloroaluminate molten salts

The crystal structure of l,2-dimethyl-3-propylimidazoIium chloride (DMPICl) reveals the formation of hydrogen bonds between the ring, methyl, and methylene hydrogens and the chloride ion. Although the aromatic rings are found in stacks, aromatic-aromatic interactions are precluded by the 6.98 Å distance between the rings. From IR and1HNMR spectroscopies, it is determined that only the hydrogen bonds between the ring hydrogens and the chloride ion persist in the room-temperature molten salts obtained from combining DMPIC1 with AlCl3.